build: package local admin service

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Dockerfile

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+# Dockerfile
+FROM python:3.12-slim
+WORKDIR /app
+COPY pyproject.toml /app/
+RUN pip install --no-cache-dir .
+COPY app /app/app
+RUN mkdir -p /data && chmod 700 /data
+ENV DATA_DIR=/data
+EXPOSE 8080
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8080"]